<style type="text/css">
    body{margin: 0;padding: 0}
    main.content {
        position: inherit;
        padding: 0 0;
    }
    .bg{width: 100%; position:fixed;height: 100%; }
    .android{width: 80%;left: 5%;position: absolute;bottom:10%;}

</style>

<div>
    <img src="__CDN__/d/download_files/bg.png" class="bg">


    <iframe id="phpernote" src="/index/download/downloadnote" style="z-index:1000;width: 90%;height:55%;position: absolute;background: white;top: 130px;left: 5%;right: 5%"></iframe>

    <a id="J_weixin" href="javascript:;">
        <img src="__CDN__/d/download_files/button.jpg" class="android" alt="安卓版下载">
    </a>

</div>

<script type="text/javascript">
    var iframe=document.getElementById('phpernote');
    document.write(iframe.scrollHeight);//滚动条高度
    document.write(iframe.scrollWidth);//滚动条宽度
</script>